diff --git a/as/stdlib.c b/as/stdlib.c
index 95b4e39..34916ed 100644
--- a/as/stdlib.c
+++ b/as/stdlib.c
@@ -128,6 +128,7 @@ void *malloc(int size)
     if (malloc_pointer_head == 0) {
         char *p = brk(0);
         int size = 0x32000000;
+        brk(p + size);
         // printf("init %d\n", p);
         malloc_pointer_head = p;
         malloc_remaining_size = size;
diff --git a/cc/stdlib.c b/cc/stdlib.c
index 36cafa2..beb334e 100644
--- a/cc/stdlib.c
+++ b/cc/stdlib.c
@@ -128,6 +128,7 @@ void *malloc(int size)
     if (malloc_pointer_head == 0) {
         char *p = brk(0);
         int size = 0x32000000;
+        brk(p + size);
         // printf("init %d\n", p);
         malloc_pointer_head = p;
         malloc_remaining_size = size;
diff --git a/ld/stdlib.c b/ld/stdlib.c
index 9bbadc6..9dc40b7 100644
--- a/ld/stdlib.c
+++ b/ld/stdlib.c
@@ -128,6 +128,7 @@ void *malloc(int size)
     if (malloc_pointer_head == 0) {
         char *p = brk(0);
         int size = 0x32000000;
+        brk(p + size);
         // printf("init %d\n", p);
         malloc_pointer_head = p;
         malloc_remaining_size = size;